Appendix D
HART Variables
D-2
Bedrock Secure OSA Remote User Manual - BRDOC020_001
10/11/18
Table D-2 HART Configuration Data
HART Variable Name
Size
Type/Range
Device Tag
12 bytes
Null terminated character string
Device Descriptor
16 bytes
Null terminated character string
Date
12 bytes
Null terminated character string
Device Message
32 bytes
Null terminated character string
Long Tag
32 bytes
Null terminated character string
PV Upper Range
4 bytes
Float
PV Lower Range
4 bytes
Float
Damping Value
4 bytes
Float
Sensor Serial Number
4 bytes
Integer Number
Device ID
4 bytes
Integer Number
Upper Sensor Limit
4 bytes
Float
Lower Sensor Limit
4 bytes
Float
Minimum Span
4 bytes
Float
Private Label Distributor Code
1 byte
Integer Number
Sensor Unit Code
1 byte
1-255
Number of Preambles
1 byte
Integer Number
Range Units
1 byte
1-255
Poll Address
1 byte
Integer Number
Manufacturer ID
1 byte
1-255
Device Type
1 byte
Integer Number
Universal Command Revision
1 byte
Integer Number
Device-specific Command
Revision
1 byte
Integer Number
Software Revision
1 byte
Integer Number
Hardware Revision
1 byte
Integer Number
Table D-3 Communication Status Bit Descriptions
Communication Status Bit
Description
Reserved 0
Buffer Overflow
Message buffer has overflowed
Reserved 1
Longitudinal Parity Error
Parity error of a serial byte
Frame Error
Message framed incorrectly
Overrun Error
Serial controller chip has overrun buffer
Vertical Parity Error
Parity error of transmitted message
Communications Error
Generic communications failure